/Engine/Plugins/2D/Paper2D/Source/Paper2D/Classes/PaperGroupedSpriteActor.h
This actor is created when you Merge several sprite components together. it is just a thin wrapper around a UPaperGroupedSpriteComponent.
[UCLASS](Programming/UnrealArchitecture/Reference/Classes#classdeclaration)(ComponentWrapperClass) class PAPER2APaperGroupedSpriteActor : public [AActor](API\Runtime\Engine\GameFramework\AActor)